Power management system and power management method

Abstract

The power management system includes HEMS controllers and energy management servers. The power management control includes a plan control that instructs HEMS controller to control HEMS based on the power supply and demand plan, and an edge control that instructs HEMS controller to control HEMS based on the actual status of HEMS surplus power and the demand power. During the planning control, the energy management server instructs HEMS controllers to perform the edge-control while at least one of the sale of the surplus power and the purchase of the demand power is predicted in HEMS.

What is claimed is: 
     
         1 . A power management system that manages power supply and demand in a power grid including a plurality of power balancing resources, the power management system comprising:
 a controller that controls a corresponding resource that is a corresponding one of the power balancing resources; and   a server that sets power management control to be performed on the corresponding resource by the controller, wherein:   the power management control includes
 a first control instructing the controller to control the corresponding resource based on a power supply and demand plan developed in advance, and 
 a second control instructing the controller to control the corresponding resource based on an actual situation of surplus power and demand power of the corresponding resource; and 
   during execution of the first control, the server instructs the controller to perform the second control during a period in which at least one of power sale of the surplus power and power purchase of the demand power is predicted to occur in the corresponding resource.   
     
     
         2 . The power management system according to  claim 1 , wherein during execution of the second control, the server instructs the controller to perform the first control during a period in which neither the power sale of the surplus power nor the power purchase of the demand power is predicted to occur. 
     
     
         3 . The power management system according to  claim 2 , wherein while the server has a control right of the corresponding resource in the first control, the server transfers the control right to the controller in the second control. 
     
     
         4 . The power management system according to  claim 1 , wherein:
 each of the power balancing resources belongs to either of a first group and a second group;   the first group includes at least one of a water heater, an electrified vehicle, a storage battery, and a fuel cell;   the second group includes at least one of an air conditioner, a lighting device, and a photovoltaic power generation facility; and   while the server sets, among the power balancing resources, a power balancing resource belonging to the first group as a control target of the first control and the second control, the server does not set, among the power balancing resources, a power balancing resource belonging to the second group as the control target.   
     
     
         5 . A power management method for managing power supply and demand in a power grid including a plurality of power balancing resources, the power management method comprising a setting step in which a server sets power management control to be performed on a corresponding resource for a controller, the corresponding resource being a corresponding one of the power balancing resources, wherein:
 the power management control includes
 a first control in which the server instructs the controller to control the corresponding resource based on a power supply and demand plan developed in advance, and 
 a second control in which the server instructs the controller to control the corresponding resource based on an actual situation of surplus power and demand power of the corresponding resource; and 
   the setting step includes
 a step of predicting whether, during execution of the first control, at least one of power sale of the surplus power and power purchase of the demand power occurs in the corresponding resource, and 
 a step of switching the power management control from the first control to the second control during a period in which at least one of the power sale of the surplus power and the power purchase of the demand power is predicted to occur.